A new simple pyrene-substituted acylhydrazone derivative, 4-（3,4-dioctyloxy） phenyl-l-pyrene acylhydrazone （PAH-8）, was designed and synthesized. The PAH-8 can form thermo-reversible organogel in DMSO, and shows g...A new simple pyrene-substituted acylhydrazone derivative, 4-（3,4-dioctyloxy） phenyl-l-pyrene acylhydrazone （PAH-8）, was designed and synthesized. The PAH-8 can form thermo-reversible organogel in DMSO, and shows gelation-induced enhanced fluorescence emission. Xerogel exhibits ribbon-like fibrous aggregates with widths of 0.5- 1 μm. The PAH-8 organogel indicates photo-responsive behaviors due to the trans-cis isomerizations of-C = N- bond upon exposure to visible or UV light. Upon visible light irradiation, the partial trans-cis isomerization of the -C=N- bond causes the fiber morphology to disappear, resulting in gel-sol transition, whereas the PAH-8 organogel exhibits few photoisomerizations from trans to cis transition without breakage of the gel state upon UV light irradiation.展开更多
基金Supporting information for this article is available on the WWW under http：//dx.doi.org/10.1002/cjoc.201700388 or from the author.Acknowledgement This work was supported by the Natural Science Foundation of Jilin Province （20170101112JC） and Project 985-Automotive Engineering of Jilin University.
文摘A new simple pyrene-substituted acylhydrazone derivative, 4-（3,4-dioctyloxy） phenyl-l-pyrene acylhydrazone （PAH-8）, was designed and synthesized. The PAH-8 can form thermo-reversible organogel in DMSO, and shows gelation-induced enhanced fluorescence emission. Xerogel exhibits ribbon-like fibrous aggregates with widths of 0.5- 1 μm. The PAH-8 organogel indicates photo-responsive behaviors due to the trans-cis isomerizations of-C = N- bond upon exposure to visible or UV light. Upon visible light irradiation, the partial trans-cis isomerization of the -C=N- bond causes the fiber morphology to disappear, resulting in gel-sol transition, whereas the PAH-8 organogel exhibits few photoisomerizations from trans to cis transition without breakage of the gel state upon UV light irradiation.
